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Oracle 1z1-076 Exam Syllabus Topics:

Topic	Details
Topic 1	Creating a Logical Standby Database: This topic guides users through the process of creating and managing a logical standby database, including SQL Apply filtering.
Topic 3	Patching and Upgrading Databases in a Data Guard Configuration: This section provides guidance on patching and upgrading databases in a Data Guard environment, along with performance optimization techniques and monitoring considerations.
Topic 4	Oracle Data Guard Broker Basics: An overview of the Data Guard broker, its architecture, components, benefits, and configurations, is provided here. It serves as an introduction to the tool used for managing Data Guard configurations.
Topic 5	Managing Oracle Net Services in a Data Guard Environment: The section focuses on Oracle Net Services and its role in Data Guard networking setup.
Topic 6	Managing Physical Standby Files After Structural Changes on the Primary Database: The topic covers managing structural changes in the primary database and their impact on physical standby files.
Topic 8	Performing Role Transitions: Here, the concept of database roles is explained, along with the steps for performing switchovers, failovers, and maintaining physical standby sessions during role transitions.
Topic 9	Backup and Recovery Considerations in an Oracle Data Guard Configuration: In this topic, Backup and recovery procedures in a Data Guard configuration are discussed, including RMAN backups, offloading to physical standby, and network-based recovery.
Topic 10	Using Oracle Active Data Guard: Supported Workloads in Read-Only Standby Databases: Here, the usage of physical standby databases for real-time queries is discussed.
Topic 11	Enhanced Client Connectivity in a Data Guard Environment: This topic focuses on enhancing client connectivity in a Data Guard setup and implementing failover procedures for seamless client redirection. It also covers application continuity to ensure uninterrupted operations during role transitions.
Topic 12	Using Flashback Database in a Data Guard Configuration: This topic covers the configuration and advantages of using Flashback Database in a Data Guard setup, as well as the process of enabling fast-start failover for seamless role changes.
Topic 13	Oracle Data Guard Basics: This topic covers the essential architecture and concepts of Oracle Data Guard. It includes sub-topics such as the physical and logical standby database comparison, benefits of Data Guard, and its integration with multi-tenant databases.

 

NEW QUESTION # 47
You detected an unrecoverable archive gap in your data guard environment. So, you need to roll standby.
forward in time without applying a large number of archive log files using this command:
RMAN> RECOVER STANDBY DATABASE FROM SERVICE-<primary database name>;
When running this command, which of the following steps can be performed automatically?
1. Remember all data file names on the standby.
2. Restart standby in nomount.
3. Restore controlfile from primary.
4. Mount standby database.
5. Rename data files from stored standby names.
6. Restore new data files to new names.
7. Recover standby.

• A. 1, 2,3,4,6,7
• B. 2,3,6,7
• C. 1,2,3,4,5,6,7
• D. 1,3,5,6,7
• E. 2,3,5,6,7

Answer: A

Explanation:
The RECOVER STANDBY DATABASE FROM SERVICE command in RMAN is designed to automate various steps required to recover the standby database, especially when dealing with an archive gap. When this command is executed, the following actions can occur automatically:
Remember all data file names on the standby (1): RMAN has the capability to recall the names and paths of all data files associated with the standby database.
Restart standby in nomount (2): The standby database can be automatically restarted in the NOMOUNT state, allowing recovery operations to proceed without the database being open.
Restore controlfile from primary (3): RMAN can restore the control file from the primary database to the standby system, ensuring that the standby has the most up-to-date control file.
Mount standby database (4): After restoring the control file, the standby database is mounted to prepare for data file recovery.
Rename data files from stored standby names (5): Not typically done automatically by this command.
Restore new data files to new names (6): New data files added to the primary since the last synchronization can be restored to the standby with their correct names.
Recover standby (7): Finally, RMAN will apply any necessary redo logs to bring the standby database up to date with the primary.
While some steps, such as renaming data files (5), typically require manual intervention or scripting, most of the recovery process can be handled by RMAN automatically, streamlining the recovery of the standby database.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Data Guard Concepts and Administration Guide

NEW QUESTION # 48
You are licensed to use Oracle Active Data Guard.
Which TWO statements are true after enabling block change tracking on a physical standby database?

• A. It allows fast incremental backups to be offloaded to a snapshot standby database, when the physical standby database is converted.
• B. It starts the CTWR process on the physical standby database instance.
• C. It allows fast incremental backups to be taken on the primary database.
• D. It starts the CTWR process on the primary database instance.
• E. It starts the RVWR process on the physical standby database instance.
• F. It allows fast incremental backups to be offloaded to the physical standby database.

Answer: E,F

Explanation:
Block change tracking is a feature that enhances the efficiency of incremental backups by recording changed blocks in a tracking file. When used with Oracle Active Data Guard:
It starts the RVWR process on the physical standby database instance (A): When block change tracking is enabled on a physical standby database, the Recovery Writer (RVWR) process is initiated. This process is responsible for recording the changes to blocks in the block change tracking file, which is then used to optimize incremental backups.
It allows fast incremental backups to be offloaded to the physical standby database (E): With block change tracking enabled on the physical standby database, fast incremental backups can be offloaded from the primary database. This reduces the workload on the primary database and utilizes the standby database for backup operations, improving overall system performance and efficiency.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Active Data Guard documentation

NEW QUESTION # 49
Which four factors can influence the rate of SQL apply on a logical standby database?

• A. the number of coordinator processes on the standby database instance
• B. the number of PREPAER processes
• C. the size of the shared pool
• D. the number of full table scans performed by SQL apply
• E. the size of the undo tablespace on the logical standby database
• F. the number of applier processes

Answer: A,B,D,F

Explanation:
The rate of SQL apply on a logical standby database can be influenced by:
* A: The number of PREPARER processes (which seems to be a typographical error and should read as PREPARER or similar) which prepare the redo data for the applier processes.
* B: The number of coordinator processes on the standby database instance which coordinate the SQL apply activities.
* C: The number of full table scans performed by SQL apply since full table scans can be resource-intensive and slow down the apply rate.
* E: The number of applier processes which apply the redo data to the logical standby database.
Option D is incorrect as the size of the undo tablespace on the logical standby database is more likely to affect the SQL apply lag rather than the rate of SQL apply.
Option F is incorrect because the size of the shared pool would typically not influence the rate of SQL apply.
The shared pool is more related to the caching of shared SQL and PL/SQL code and control structures.
References: Oracle's documentation on SQL Apply in Data Guard configurations discusses the factors affecting the performance of SQL Apply operations on logical standby databases.

NEW QUESTION # 50
You created the PRODSBY1 physical standby database for the PROD primary database using gql and RMAN.
You are planning to create a Data Guard Broker configuration. You execute the command:

Which three statements are true regarding the execution of the command?

• A. The command will execute successfully only if Oracle Net connectivity to the PROD and PRODSBYl database instances are defined on the primary host.
• B. The PRODSBYI standby database is automatically added to the configuration if Oracle Net connectivity to the PRODSBYl database instance is defined on the primary host.
• C. The PRODSBY1 standby database is automatically added to the configuration if DG_BROKER_START is TRUE for PRODSBYl.
• D. The command will execute successfully only if Oracle Net connectivity to the PROD database instance is defined on the primary host.
• E. The command will execute successfully only if the DG_BROKER_START initialization parameter is set to TRUE for the PROD database instance.
• F. The Data Guard Broker configuration files is automatically created in the destinations specified by the DG_BROKER_CONFIG_FILEn initialization parameters on the primary database.

Answer: D,E,F

Explanation:
The command executed (CREATE CONFIGURATION 'DGConfig' AS PRIMARY DATABASE IS ' PROD' CONNECT IDENTIFIER IS PROD;) is used to create a Data Guard Broker configuration named
'DGConfig'. The successful execution of this command depends on several conditions:
* A: The DG_BROKER_START parameter must be set to TRUE on the primary database to start the Data Guard Broker processes. Without the broker processes running, the configuration cannot be created.
* D: Oracle Net connectivity to the PROD database instance must be established on the primary host. This is because the Data Guard Broker requires network accessibility to communicate with the primary database and manage the configuration.
* E: When the configuration is created, the Data Guard Broker configuration files are indeed automatically created in the locations specified by the DG_BROKER_CONFIG_FILEn parameters on the primary database.
It's important to note that the command will not automatically add the PRODSBY1 standby database to the configuration (thus B and C are not correct), and there is no requirement for the standby database to have Oracle Net connectivity defined on the primary host for the execution of this command (making F incorrect as well).
References: This information can be validated in Oracle's Data Guard Broker documentation, which outlines the requirements for setting up and managing a Data Guard configuration using the Data Guard Broker.

NEW QUESTION # 51
Examine this list of possible steps:
1. Raise the compatibility level on both databases.
2. Restart SQL Apply on the upgraded logical standby database.
3. Start SQL Apply on the old primary database.
4. Perform a Switchover to the logical standby database.
5. Upgrade the logical standby database.
6. Upgrade the old primary database.
Which is the minimum number of steps in the correct order, to perform a rolling release upgrade of a data guard environment using an existing logical standby database and to enable the new functionality?

• A. 5,2,4,6,3,1
• B. 1,5,2,4,6,3
• C. 5,2,4,3,6,1
• D. 4,6,5,2,3,1
• E. 5,2,4,1

Answer: B

Explanation:
The process of performing a rolling release upgrade in a Data Guard environment using a logical standby database generally involves these steps:
Raise the compatibility level on both databases (1): Ensuring both the primary and logical standby databases are operating with the same and correct compatibility level is essential before starting the upgrade process.
Upgrade the logical standby database (5): Apply the database upgrade to the logical standby first, which allows the primary database to continue serving the workload without interruption.
Restart SQL Apply on the upgraded logical standby database (2): Once the logical standby has been upgraded, SQL Apply must be restarted to apply the redo data from the primary database, which is still running the earlier version.
Perform a switchover to the logical standby database (4): After confirming that the logical standby database is successfully applying redo data, perform a switchover to make it the new primary database.
Upgrade the old primary database (6): With the new primary database now in place, upgrade the old primary database (which is now the new standby) to the new Oracle Database release.
Start SQL Apply on the old primary database (3): Finally, start SQL Apply on what is now the standby database to synchronize it with the new primary database.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database Upgrade Guide

NEW QUESTION # 52
You must configure flashback database for your Oracle 19c databases that will be part of a Data Guard Broker configuration.
The databases are all in ARCHIVELOG mode.
You will execute the SQL statement:
ALTER DATABASE FLASHBACK ON;
Which three are true concerning this command?

• A. If executed successfully on an Oracle 19c primary database, flashback will also be enabled on all physical standby databases that are part of the configuration.
• B. It will execute successfully on an Oracle 19c physical standby database while Real Time Query is active.
• C. It will execute successfully on an Oracle 19c logical standby database while SQL apply is active.
• D. It will execute successfully while an Oracle 19c primary database is open.
• E. It will execute successfully while an Oracle 19c primary database is mounted.
• F. If executed successfully on an Oracle 19c primary database, flashback will also be enabled on all logical standby databases that are part of the configuration.

Answer: C,D,E

Explanation:
The command ALTER DATABASE FLASHBACK ON; enables the Flashback Database feature, which provides a way to quickly revert an entire Oracle database back to a previous point in time. This command can be executed while an Oracle 19c primary database is either open (option A) or mounted (option B). It is also applicable to an Oracle 19c logical standby database while SQL Apply is active (option E). However, it's important to note that enabling Flashback Database on the primary does not automatically enable it on all associated standby databases, whether they are physical or logical. Each database in a Data Guard configuration must have Flashback Database explicitly enabled if desired. Real Time Query being active on a physical standby does not directly relate to the ability to execute this command on the standby. References:
The explanation is based on Oracle's concepts for Flashback Technology and Data Guard configurations as detailed in the Oracle Database Backup and Recovery User's Guide and the Oracle Data Guard Concepts and Administration guide.

NEW QUESTION # 53
Which three statements are true about snapshot standby databases?

• A. Tablespaces can be created.
• B. A logical standby database can be converted into a snapshot standby database.
• C. The switchover TO command allows a switchover operation to a snapshot standby database.
• D. The FATLOVER TO command results in a transition of a snapshot standby database to the primary role.
• E. Tablespaces can be dropped.
• F. Tables can be dropped.

Answer: A,E,F

Explanation:
A snapshot standby database is a fully updateable standby database that is created by converting a physical standby database into a snapshot standby database. The main characteristics of a snapshot standby database include:
B: Tablespaces can indeed be dropped in a snapshot standby database because it is updateable and allows all types of DML and DDL operations that do not conflict with the standby role.
C: Tablespaces can be created in a snapshot standby database for the same reasons that they can be dropped; it supports all operations that do not interfere with its standby nature.
E: Tables can be dropped in a snapshot standby database, as it is a fully updateable standby.
Options A and D are incorrect because 'FAILOVER TO' and 'SWITCHOVER TO' commands are not used with snapshot standby databases in these contexts. A failover converts a standby database into the primary role after the original primary has become unavailable, and is not a reversible role transition. Switchover is a planned role reversal between the primary database and one of its standby databases and is not applicable to snapshot standby databases in the context provided.
Option F is incorrect because a logical standby database cannot be converted into a snapshot standby database directly. A logical standby is used for different purposes such as reporting and querying with real-time data, and its structure is different from a physical standby which can be converted into a snapshot standby.

NEW QUESTION # 54
Which THREE are true about using flashback database in a Data Guard environment?

• A. When a flashback database operation is performed on a primary database, a physical standby database is also flashed back automatically.
• B. It may be used to flash back a physical standby that receives redo from a far sync instance.
• C. It may not be used to flash back a primary database after a failover to a physical standby.
• D. You can use it when real-time apply is enabled in case the physical standby suffers from logical corruption.
• E. You can use it when real-time apply is enabled in case the phylt may not be used to flash back a primary database after a failover to a logical standby.
• F. When a flashback database operation is performed on a primary database, a logical standby database is also flashed back automatically.

Answer: B,C,D

Explanation:
Flashback Database is a feature that allows reverting a database to a previous point in time, which is extremely useful in various Data Guard configurations:
* It may be used to flash back a physical standby that receives redo from a far sync instance (C):
Flashback Database can be used on a physical standby database to revert it to a past point in time, even when it is receiving redo data from a far sync instance. This can be particularly useful to recover from logical corruptions or unwanted changes.
* You can use it when real-time apply is enabled in case the physical standby suffers from logical corruption (D): Even when real-time apply is enabled, which allows redo data to be applied to the standby database as soon as it is received, Flashback Database can be used to revert the physical standby database to a point in time before the logical corruption occurred.
* It may not be used to flash back a primary database after a failover to a physical standby (E):
After a failover has occurred from a primary to a physical standby database, making the standby the new primary, Flashback Database cannot be used to revert the old primary database to a state before the failover because the failover operation makes irreversible changes to the database role and configuration.References:
* Oracle Database Backup and Recovery User's Guide
* Oracle Data Guard Concepts and Administration

NEW QUESTION # 55
Your Data Guard environment has two remote physical standby databases.
Client applications use the local naming method to define connectivity to the primary database instance.
Which will automatically redirect clients to the new primary database in case of a switchover or failover?

• A. Set the DB_NAME parameter identically on all databases; modify the connection descriptor on the clients to use DB_NAME to connect to the primary database instance.
• B. Configure a PRIMARY role service on the Primary and Standby and modify the Client connect descriptor to include both the Primary and the Standby.
• C. Set the LOCAL_LISTENER parameter for all the database instances, to register services with the default listener on the primary database host.
• D. Create a database service on the standby databases; automate the start of the service after a role change, and modify the connection descriptor on the clients to use that service.

Answer: D

NEW QUESTION # 56
Which TWO statements are true about Real-Time Query?

• A. Real-Time Query has no limitations regarding the protection level of the Data Guard environment.
• B. Real-Time Query sessions can be connected to a Far Sync instance.
• C. Disabling Real-Time Query prevents the automatic start of redo apply when a physical standby databases opened read only.
• D. A standby database enabled for Real-Time Query cannot be the Fast-Start Failover target of the Data Guard configuration.
• E. Setting standby_max_data_delay=0 requires synchronous redo transport.

Answer: C,E

Explanation:
Real-Time Query is a feature that allows queries to be run on a physical standby database while it is applying redo data. The relevant truths about it are:
* Setting standby_max_data_delay=0 requires synchronous redo transport (A): For the real-time apply feature to function with no data delay (zero delay), synchronous redo transport must be used. This setting ensures that the data on the standby database is as current as possible before queries are executed against it.
* Disabling Real-Time Query prevents the automatic start of redo apply when a physical standby database is opened read-only (C): If Real-Time Query is disabled, opening the standby database in read-only mode will not start the redo apply process automatically. Redo apply needs to be manually started to synchronize the standby database with the primary.References:
* Oracle Data Guard Concepts and Administration Guide

NEW QUESTION # 57
Which three statements are true about Data Guard database modes and states?

• A. A Logical Standby Database can be in MOUNT state while applying changes.
• B. Force Logging Mode is not required for a primary database but is recommended.
• C. The Primary Database can operate in noarchivelog mode.
• D. Databases in a Data Guard Configuration need not operate in Flashback Logging mode.
• E. A primary database may ship redo directly to more than nine standby databases.

Answer: A,B,D

NEW QUESTION # 58
Which four factors can influence the rate of SQL apply on a logical standby database?

• A. the number of coordinator processes on the standby database instance
• B. the number of PREPAER processes
• C. the size of the shared pool
• D. the number of full table scans performed by SQL apply
• E. the size of the undo tablespace on the logical standby database
• F. the number of applier processes

Answer: A,B,D,F

Explanation:
The rate of SQL apply on a logical standby database can be influenced by:
A: The number of PREPARER processes (which seems to be a typographical error and should read as PREPARER or similar) which prepare the redo data for the applier processes.
B: The number of coordinator processes on the standby database instance which coordinate the SQL apply activities.
C: The number of full table scans performed by SQL apply since full table scans can be resource-intensive and slow down the apply rate.
E: The number of applier processes which apply the redo data to the logical standby database.
Option D is incorrect as the size of the undo tablespace on the logical standby database is more likely to affect the SQL apply lag rather than the rate of SQL apply.
Option F is incorrect because the size of the shared pool would typically not influence the rate of SQL apply. The shared pool is more related to the caching of shared SQL and PL/SQL code and control structures.

NEW QUESTION # 59
Which TWO observations are true about the Far Sync instance?

• A. Applies redo received
• B. Can be created using the RMAN DUPLICATE command
• C. Receives redo synchronously from the primary database
• D. Can only be created using a series of SQL commands
• E. Includes a standby control file, password file, data files, standby redo logs, and archive logs

Answer: A,C

Explanation:
A Far Sync instance is a special kind of Oracle Data Guard configuration that allows synchronous redo transport from a primary database to a remote standby database with minimum impact on the primary database's performance. The Far Sync instance receives redo data synchronously from the primary database (A), then ships it asynchronously to the remote standby database, thus extending zero data loss protection over longer distances and higher network latency environments than would be practical with a synchronous standby alone. The Far Sync instance does not apply the redo data; it just receives and ships it (E). A Far Sync instance does not have data files, and it cannot apply redo to stay synchronized with the primary database.
References:Oracle Database High Availability Overview and Oracle Data Guard Concepts and Administration documentation detail the role and configuration of Far Sync instances, including how they contribute to achieving zero data loss disaster recovery over long distances.

NEW QUESTION # 60
Which THREE steps are prerequisites for the creation of a physical standby database on a separate server using the RMAN active database duplication method?

• A. Establish user equivalence for the database software owner between the primary host and standby host.
• B. Set the DB_UNIQUE_NAME parameter on the primary database to a different value than that of the DB_NAME name parameter.
• C. Configure Oracle Net connectivity on the primary host to the standby database instance.
• D. startup nomount the standby database instance.
• E. Put the primary database into archivelog mode.

Answer: A,C,D

Explanation:
Creating a physical standby database using RMAN active database duplication requires certain prerequisites to ensure a successful and seamless operation:
Configure Oracle Net connectivity on the primary host to the standby database instance (A): Proper Oracle Net connectivity between the primary and standby servers is essential for communication and data transfer during the duplication process. Oracle Net services provide the network foundation for Oracle Database, Oracle Net Listener, and Oracle applications.
Establish user equivalence for the database software owner between the primary host and standby host (B): User equivalence ensures that the user who owns the Oracle Database software on the primary server has the same privileges on the standby server. This is crucial for RMAN to perform operations on both servers without encountering permission issues.
Startup nomount the standby database instance (C): The standby database instance needs to be started in the NOMOUNT stage before the duplication can begin. This prepares the environment for creating the control file and restoring the database without mounting it, which is a necessary step in the RMAN duplication process.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Data Guard Concepts and Administration

NEW QUESTION # 61
A Data Guard environment has this configuration and these attributes:
The primary database prima is in the local region.
A physical standby database physt1 is in the local region.
A physical standby database physt2 is in a remote region.
The primary ships redo to physt1.
physt1 ships redo to physt2.
physt1 and physt2 have Real-Time Query enabled.
A sequence has been created with this SQL statement in the primary database:
CREATE SEQUENCE a NOCACHE SESSION;
Which TWO statements are TRUE?

• A. The sequence is usable on physt2 if physt1 becomes unavailable, but only if an alternate redo destination has been configured on the primary database.
• B. The sequence is usable on physt1 but not usable on physt2.
• C. physt2 will no longer receive redo if physt1 becomes unavailable, unless LOG_ARCHIVE_DEST_n has the ALTERNATE attribute specified on the primary database.
• D. physt2 will no longer receive redo if physt1 becomes unavailable, unless LOG_ARCHIVE_DEST_n has the ALTERNATE attribute specified on physt1.
• E. The sequence is usable on physt1 and physt2.

Answer: C,E

NEW QUESTION # 62
Examine the Data Guard configuration:
DGMGRL> show configuration;
Configuration - Animals
Protection Mode: MaxAvailability
Databases:
dogs - Primary database
sheep - Snapshot standby database
cats - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
You receive an error while attempting to raise the protection mode to Maximum Protection:
DGMGRL> edit configuration set protection mode as maxprotection;
Error: ORA-16627: operation disallowed since no standby databases would remain to support protection mode Failed.
Which is the minimum statement, or sequence of statements you must execute to enable successful raising of the protection mode to Maximum Protection?

• A. DGMGRL> edit database cats set property LogXptMode=sync;
• B. DGMGRL> edit database dogs set property LogxptMode=sync;
• C. DGMGRL> edit database dogs set property LogxptMode=sync;
  DGMGRL> edit database sheep set property LogxptMode=sync;
• D. DGMGRL> edit database sheep set property LogXptMode=sync;
• E. DGMGRL> edit database dogs set property LogXptMode=sync;
  DGMGRL> edit database sheep set property LogxptMode=sync;
  DGMGRL> edit database cats set property LogXptMode=sync;
• F. DGMGRL> edit database dogs set property LogXptMode=sync;
  DGMGRL> edit database cats set property LogXptMode=sync;

Answer: F

NEW QUESTION # 63
......

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